| abstract |
The present invention relates to a novel heteropolyacid catalyst defined by the following chemical formula 1 used in a process for producing methacrylic acid (MAA) by partially oxidizing methacrolein (MACR) and a process for producing the same. In addition, the heteropolyacid catalyst produced by the method of the present invention exhibits high catalytic activity with excellent conversion, selectivity and yield as compared with conventional heteropolyacid catalysts. (Chemical formula 1) PMo a A b B c C d D e E f O g (In the above formula, A, B, C, D, E, a, b, c, d, e, f and g are as defined in the specification) |